I cut a slit from the stop of the shoulder to 2 inches from the bottom of the extra cuff on sleeve to make the "peek-a-boo" sleeve. Leaving the cut edge un-hemmed worked fine with this shirt, the fabric just rolls in.
Lay your shirt down flat. Decide how much you want to take it in. If it fits the way you want, skip this step.
I pinned where I wanted to cut before cutting.
I cut a 3inch strip off around the bottom , to make the extra length in the sleeves.
If you want to stamp with gel bleach, apply the gel bleach onto the stamp with a brush. When your image has faded to the shade you like, heat set it with an iron, or toss it in the dryer.
There are hundreds of posts (by other creative and talented people) on how to make a ribbon flower, so I will leave that part out of this post.